Title:
REVERSE OSMOSIS AND NANOFILTRATION MEMBRANE CLEANING
Document Type and Number:
WIPO Patent Application WO/2014/132069
Kind Code:
A3
Abstract:
A method of cleaning a reverse osmosis or nanofiltration membranes comprises supplying bubbles suspended in a stream of cleaning solution to the membrane. The bubbles can be supplied in pulses and/or the aerated solution may be evenly distributed over the membrane surface. The bubbles can be produced by a venturi device. A venturi device for use in the method has an air inlet provided with a plurality of tubes and a reverse osmosis plant in which the method can be carried out includes a venturi device connected in-line between the cleaning tank and the fluid inlet.
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Inventors:
FAZEL MAQSOOD (GB)
CHESTERS STEPHEN (GB)
CHESTERS STEPHEN (GB)
Application Number:
PCT/GB2014/050592
Publication Date:
October 23, 2014
Filing Date:
February 28, 2014
Export Citation:
Assignee:
GENESYS INTERNAT LTD (GB)
International Classes:
B01D61/10; B01D65/02; B01D65/06
Domestic Patent References:
| WO2008053700A1 | 2008-05-08 | |||
| WO2006066350A1 | 2006-06-29 |
Foreign References:
| JP2008207158A | 2008-09-11 | |||
| US20120074059A1 | 2012-03-29 |
Other References:
DATABASE WPI Week 200931, Derwent World Patents Index; AN 2009-H43989, XP002723981
CORNELISSEN E R ET AL: "Optimization of air/water cleaning (AWC) in spiral wound elements", DESALINATION, ELSEVIER, AMSTERDAM, NL, vol. 236, no. 1-3, 31 January 2009 (2009-01-31), pages 266 - 272, XP025839585, ISSN: 0011-9164, [retrieved on 20081224], DOI: 10.1016/J.DESAL.2007.10.076
CHESTERS ET AL: "Innovations in the inhibition and cleaning of reverse osmosis membrane scaling and fouling", DESALINATION, ELSEVIER, AMSTERDAM, NL, vol. 238, no. 1-3, 1 March 2009 (2009-03-01), pages 22 - 29, XP025884087, ISSN: 0011-9164, [retrieved on 20090123], DOI: 10.1016/J.DESAL.2008.01.031
CORNELISSEN E R ET AL: "Optimization of air/water cleaning (AWC) in spiral wound elements", DESALINATION, ELSEVIER, AMSTERDAM, NL, vol. 236, no. 1-3, 31 January 2009 (2009-01-31), pages 266 - 272, XP025839585, ISSN: 0011-9164, [retrieved on 20081224], DOI: 10.1016/J.DESAL.2007.10.076
CHESTERS ET AL: "Innovations in the inhibition and cleaning of reverse osmosis membrane scaling and fouling", DESALINATION, ELSEVIER, AMSTERDAM, NL, vol. 238, no. 1-3, 1 March 2009 (2009-03-01), pages 22 - 29, XP025884087, ISSN: 0011-9164, [retrieved on 20090123], DOI: 10.1016/J.DESAL.2008.01.031
Attorney, Agent or Firm:
BROOKES BATCHELLOR LLP (London, Greater London WC2A 1JE, GB)
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